1. Big hatsThey understand certain smaller hats like beanies or baseball caps. Those are functional pieces that guys wear too. But throw a big floppy brim into the equation and they're completely lost. (Don't even get them started on fascinators!)

2. Bags bigger than a lunchboxGuys have pockets, so bags in general seem unnecessary to them, but big bags, especially full ones, are a complete mystery. At least, they figure, with a bag that big you can carry around some of their stuff too.

4. Designer basicsEver tried to explain the difference between a $95 white T-shirt from Vince and one you buy in a pack of three from the drug store? You might as well try to explain long division to a cactus.

5. Fancy sweat pantsYou would scream at them if they tried to wear sweats out on a date. Why is it OK for you? They're convinced that there is a double standard at work here. The same thing goes for fancy silk pajamas as an outfit.

12. High heels that hurt your feetWhy don't you just take them off if they hurt so much? Besides, that pair of oxfords he has to wear at work sometimes are uncomfortable too, but you don't hear him complaining about it.

18. Cat graphicsCats in general are a problem. "They don't even do anything," they say. But cats on a T-shirt? You're crazy. Really any animal graphic that's not a leopard print on a crop top is probably going to be a problem for them.

19. Cool stuff that used to be uncoolThey get cool in like the rock-n-roll sense of the word — band tees, high-heeled boots, leather jackets — but Christmas sweaters? Fanny packs? No way. The most you can hope for is that they get on board because they think you're being ironic.